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High-Linearity Wireless Passive Temperature Sensor Based on Metamaterial Structure with Rotation-Insensitive

Chenying Wang1,2, Luntao Chen2,3, Bian Tian2,3

  • 1School of Instrument Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.

Nanomaterials (Basel, Switzerland)
|September 9, 2023
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Summary

This study introduces a wireless passive temperature sensor using metamaterials for moving parts. It accurately measures temperature with a high sensitivity of 205.22 kHz/°C and offers overheating warnings.

Keywords:
metamaterial structuremicrowave scattering measurementtemperature sensorwireless passive

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Physics

Background:

  • Accurate temperature monitoring of moving components is crucial in many industrial applications.
  • Existing sensors may face limitations in wireless, non-contact, or harsh environment measurements.

Purpose of the Study:

  • To develop and characterize a novel wireless passive temperature sensor.
  • To enable non-contact temperature measurement of moving and rotating parts.

Main Methods:

  • A metamaterial structure with a double split-ring resonator on an alumina substrate was designed.
  • The temperature-dependent resonant frequency shift was wirelessly detected using an antenna.
  • Sensor performance was evaluated across a temperature range of 25-135 °C.

Main Results:

  • The sensor demonstrated a high temperature sensitivity of 205.22 kHz/°C.
  • A strong linear response was observed with R² = 0.995.
  • The sensor showed insensitivity to rotation angle and included a distance warning functionality for overheating detection.

Conclusions:

  • The proposed metamaterial-based sensor is effective for wireless, passive temperature measurement of moving parts.
  • Its robustness and additional safety features make it suitable for industrial applications.
  • This technology offers a promising solution for real-time temperature monitoring in challenging environments.